- Includes brake pedal actuator, force transducer, displacement potentiometer
- Easy to handle package contains nitrogen tank, plumbing, control electronics
- Compatible with FMVSS 135 and NCAP testing
- Rapid apply rate (<10ms rise time, depending on model and installation)
- Applies “step input” for system response time measurement
- May be triggered manually or by external sensor
Designed to be used as a development tool for FMVSS 135 and NCAP Stopping Distance testing, the Pneumatic Brake Test Instrument (PBTI) measures brake system response during in-vehicle or lab testing. The standard brake actuator is optimized for rapid rise times up to a 500 N limit as specified in FMVSS135. Optional actuators can be used for higher forces as might be required for ABS tests, or FMVSS105 tests, or any lab or road test requiring a constant brake apply force. Other options include control over the apply rise time. Note: Options and other modifications can increase the apply rise time.
The operator can fine-tune the actuation force by regulating the pressure of nitrogen delivered to the actuator, allowing repeatable, consistent stops. The PBTI can be triggered manually or remotely through an optional photoelectric switch. The PBTI will stay activated only while the operator depresses the trigger. Once the trigger is released the actuator returns to its original position.
Analog force and pedal-travel signals are obtained through a strain-gaged transducer (Michigan Scientific Brake Pedal Force Transducer) and a Linear Potentiometer respectively; both of which can be connected directly to a portable data acquisition system. The PBTI can be adjusted to accommodate many different foot wells for passenger cars, trucks and SUV’s. The Michigan Scientific Brake Pedal Force Transducer can also be adjusted to accommodate many different styles of brake pedals.